Coolant Overflow Tank Kit for 2007.5-2010 LMM 6.6L Duramax | SPELAB
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Product Information +
- Brand: SPELAB
- SKU: SPCS08914BK
- Availability: Many in stock
- Product Type: Coolant Reservoir Tank
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PLEASE NOTE!
A practical upgrade for 2007.5-2010 LMM Duramax trucks, this aluminum coolant overflow tank adds factory-harness level sensing, a sight glass, and a cleaner engine-bay layout.
2007.5-2010 LMM Duramax Coolant Overflow Tank Overview

The SPELAB Coolant Tank Kit is a replacement for the factory coolant tank, designed to relocate it closer to the battery box, freeing up additional space in the engine compartment. Constructed from high-quality aluminum alloy, the tank features a durable powder-coated finish for enhanced protection and a sleek appearance. It is equipped with an integrated coolant level sensor that connects seamlessly to the factory harness, providing accurate coolant level monitoring. Upgrade your coolant tank with the SPELAB Coolant Tank for improved functionality and a clean, professional look.

Key Features of the LMM Duramax Coolant Overflow Tank
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High-Quality Aluminum Alloy Construction
Built from durable aluminum alloy for superior strength and corrosion resistance, ensuring long-lasting performance even under extreme conditions. -
Powder-Coated Finish
Features a premium powder-coated surface that enhances durability, provides scratch resistance, and offers a sleek, professional look. -
Integrated Low Coolant Level Sensor
Comes with a built-in coolant level sensor that connects directly to the factory harness, ensuring real-time and accurate monitoring of coolant levels. -
Billet Anodized Cap
Includes a high-quality billet aluminum cap with an anodized finish, offering enhanced durability and a premium aesthetic touch. -
Overflow Hose
Equipped with an overflow hose to ensure proper coolant system functionality and prevent over-pressurization. -
Coolant Level Sight Glass
Designed with a sight glass for quick and easy visual checks of coolant levels without needing to open the tank. -
Complete Installation Hardware
Includes all necessary installation hardware, making the upgrade process straightforward and hassle-free.
Coolant Overflow Tank Specifications
| Brand | SPELAB |
| Weight | 3.06kg |
| Type | Coolant Expansion Tank |
| Installation Level | Simple |
| Fitment | 2007.5-2010 GMC/Chevrolet LMM Sierra/Silverado 2500HD 3500HD 6.6L Duramax |
Best For
- 2007.5-2010 Chevy Silverado and GMC Sierra 2500HD/3500HD 6.6L LMM Duramax trucks.
- Owners replacing an aging factory coolant reservoir or relocating the tank for improved engine-bay space.
- Drivers who want a built-in low-coolant sensor that connects to the factory wiring harness.
- Work-truck and towing applications that benefit from a durable aluminum tank and quick visual coolant checks.
